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IGCSE A Level Physics Certification Exam Tests

IGCSE A Level Physics Practice Test 17

# Interference Quiz Questions and Answers PDF - 17

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The Quiz: For destructive interference, path difference is; "Interference" App Download (Free) with answers: Even number of half wavelengths; Odd number of half wavelengths; Whole number of wavelengths; Even whole number of wavelengths; for 2 year online degrees. Learn Superposition of Waves Questions and Answers, Apple eBook to download free sample to study online training courses.

## Interference Questions and Answers : Quiz 17

MCQ 81:

For destructive interference, the path difference is

1. odd number of half wavelengths
2. even number of half wavelengths
3. whole number of wavelengths
4. even whole number of wavelengths
MCQ 82:

Electrical force exerted by two point charges on each other is inversely proportional to

1. sum of their charges
2. product of their charges
3. distance between them
4. square of distance between them
MCQ 83:

Weakest force in nature is

1. electric force
2. gravitational force
3. weak force
4. magnetic force
MCQ 84:

Unit for pressure used in weather maps is millibar. 1 millibar is equal to

1. 1000 bar
2. 100 kPa
3. 100 Pa
4. 1 atm
MCQ 85:

Energy in deformed solid is called

1. stress energy
2. potential energy
3. kinetic energy
4. strain energy